Pipe-molding apparatus



(No Model.) sheets-sheen 1. J. C. MGDBRMOTT. -YPIPE MOLDING APPARATUS.

AHI.) 1.

Il/Ar (No Model.)

J. C. Mc-DERMOTT.' PIPP MOLDING APPARATUS.'

PIO. 357,492.

Patented Feb. 8. 1887.

W/T/VESSES:

' ATTOH/VEY Nrrnn STATES PATENT anion.

PIPE-MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 357,492,datedrPebruary-B, 1887.

i Application filed February 11, 1886. Serial No. 191,553. (No model.)

To all whom/ it may concern.-

Beit known that l, J AMES C. MCDERMOTT, of Chicago, in the county ofCook and State of Illinois, have invented certain new and useful`Improvements in Pipe-Molding Machines;

and I do hereby declare that the following is a full, clear, and exactdescription of the inventiomwhich will enable others skilled in the artto whichit appertains to make and use the same, reference being had tothe aecompanying drawings, and to letters of reference marked thereon,which form a part`of this speciiication.-

Heretofore it has been customary to make molds for casting iron pipe bypacking the cope and drag thereof by hand or hand implements, whichrequires the exercise of considerable skill and much labor.

rThe object of my invention is to Vmake the molds, so far as thebuildingof the parts thereof is concerned, entirely by machinery. ThisIdo,expeditiously and thoroughly, by uniting the parts of the flask around avertical pattern, feeding the sand into the space between the two fromthe top, and packing the same by means of a cylindrical packer, Awhichas it packs the sand is lifted or forced upward out of said space,substantially as hereinafter described, and as illustrated in thedrawings, in which- Figure 1 is aside elevation of the apparatusembodying my invention. Fig. 2 is avertcal transversesection of thesame. Fig. Sis a detail view showing the lower end ofthe cylindersurroundin g and actuating the packer.

Y Fig. 4 is a detail view showing the top end of the drag and cope. Fig.5 shows a plan View of the iiask, showing the clamps for holding theparts together. Fig. 6 is a detail view showing a side elevation of asprocket-wheel. Fig. 7 is a plan view of the packer, showing part of thehead broken away to expose the friction-rollers. Fig. v8 is a detailView show ing the head of the packer in cross -section. Fig. 9 isa'horizontal transverse section oi' the flask when itis in position forthe mold to be built therein. Fig. l0 is a detail view showing a sectionofthe iiask in cross-section. Fig. 11 is a detail View showing thescrew-threaded end of the packer, and Fige 12 is a vertical transversesection of the lower part of the apparatus embodying my invention.

` Reference being had to the drawings, A and A represena the drag andcope of the flask,

-havinglegs a ce projecting laterally from them,

as shown in Fig. 9, and having, vwhen closed Aand iitted together,thegates a. The parting line of the drag and cope of the flask divides thegates a', so that one half projects from and is made integral with thecope, and the other half projects from and is made integrant with thedrag. A cap or cover, B, is provided for the gates a, which has alongitudinal projection, b, on its inner surface, which comes to anedge, so that it makes the opening complete to the parting line when theflask is be; f

ing built.

Vhen it is desired to ilask, the parts' thereof are placed concentric toand around the vertical stationary pattern C, the basal flanges restingon the iianges of a short cylinder, D, and the upper ends being clampedtogether by a clamp, c, consisting of twoarms pivoted to the verticalstandard E, surrounding the flask and having their outer bund a mold inthe ends bolted together, as shown in Fig. 5. The

cylinder D is scoured to and supported by standardE, and has its lowerend flanged. Suitably secured to this iange is the flange on the lowerend of the pattern C. When it is desired to build the mold, thecylindrical packer F, which is suitably and concentrically vsuspendedabove the ask, Vis lowered down into the space between the pattern andiiask until it reaches a point near the hub of the pattern. The sand isthen fedV to the flask from a conical-shaped hopper located above,surrounding the packer, and secured to the vertical standard in such amanner as to be capable of a limited vertical adjustment, as will bemore fully explained hereinafter.

The packer F Vis provided with a screwthread or spiral flange around itslower end, so that as the sand is fed to the flaskV it revolves in suchdirection as to pack the sand and at the saine time lift itselfv out ofthe same. The packer F is suspended by means'of a suitable rope, chain,or cable, d, which passes over .a pulley, c, having bearings in a frameor ICO standard E, and having a counter-weight, d', on its other end. Inorder to permit the revolving :motion of the packer without twisting thechain or cable d, I provide a circular plate, g, having a central studprojecting up through a corresponding aperture in said head, to theupper end of which said cable or rope is attached. Between the plate gand the inner surface of the head of the packer I place smallfriction-rollers, thus permitting the revolutions of the packer withoutgenerating friction.

In order to revolve the packer when it is desired to build the mold inthe manner just explained, I surround it with a drum, G,whieh isprovided with annular flanges It h at its top, and about one-quarter itslength above its lower end, which latter is just about on the plane orjust above the plane ofthe mouth of the hopper. These ilanges rest onfrictionrollers, which have bearings in 4suitable recesses or channelsin rings l', surrounding the drum and secured permanently to thestandard E.

Surrounding the drum Giust above, or inade integrant with the loweriiange, h., is a beveled gear, H, which is engaged by a beveled pinionon the end ofthe drive-shaft J, the contiguous end of which ispreferably journaled l in the bearings in the standard, and the other inthe end of au upright arm of a frame se cured to and projecting fromsaid standard. Shaft J is provided with a nest of pulleys on its outerend, which are connected by suitable belting to the main shaft. Arrangeddiametrica-lly opposite each other on the inner cir cumference of thedrum are the longitudinal iianges L 7i', and projecting from the head ofthe packer are the lugs 7J, which, when the drum turns, are struck bythe flanges 7c, thus carrying the packer around with it, and at the sametime permitting the packer to move vertically. c If desired, lugs Zzmay, as shown inFigs. 7 and S, have friction-rollers journaled in theirends, and I prefer them this way, as less friction is generated when thepacker moves vertically.

I represents a vertical shaft, the upper end of which has bearings inthe same frame as has the outer end of the drivcshaft J and the lowerend of which is suitably journaled in a frame projecting horizontallyfrom said standard. It derives motion by means of beveled gearing fromthe drive-shaft, and has a beveled gear on its lower end, which impartsmotion by means of a similar gear to the companion part of clutch K. Theclutch K has a longitudinal motion on shaft L by reason lof a feather onthe same, and its edges and the engaging edges of the companion part areserrated, as shown, so that when brought together they lock. Then thuslocked, the companion part imparts its motion to the clutch K, andthrouglrit moves the shaft L.

The clutch K is reciprocated automatically by the bifurcated arm m, theextremities of which latter enter the annular groove in the body of saidclutch. This arm my is secured t0 the center of length of a leverinlcrumed about its center to a lug projecting from the standard E. Theends of this lever are connected by means of connecting-rods a a to acrank and double crank, respectively, extending indiainetricallyopposite directions from the shaft N, jonrnaled in thestandard E, and a frame secured to and projecting from the same abovethe plane of the upper end of the drum, so that its outer end will comeabout over the vertical center of the packer.

0n the end of crank-shaft N is a sprocket wheel, O, the arms of thebifnrcated sprockets of which pass on either side of cable d. When thepacker is about leaving the ilask,tl1e bnttous o o on the cabledocatcdwith reference to this purpose, catch in the arms of the sprockets andturn the crank-shaft sufficient to actuateV the connecting-rods andthrow the clutch K into engagement with its companion part, thusimparting motion to shaft L. Sprocket O is loose on theshaftand can turnfreely when the packer is being lowered; but when the packer is raisedand the buttons, as explained, reverse the motion of the sprocket-wheel,it turns the shaft N by means of a ratchet, a', snug against its sideand fast to said crankshaft, and pawls ou theA adjacent face of thesprocket, arranged in such position that they engage said ratchet. Whenthe shaft L is thus set in motion, the cams r r, fast to sleeves 5 ithereon, bear against the u nder side of a crossbar, yr', and raise thesame. I make in said cams diametrical slots 2 2, and instead of male'ing them fast to the said shaft L,secure them, by means of bolts 3 3,passing through slots 2 2, to the contiguous eccentric circular flanges4 4 of sleeves 5 5, fast on said shaft. rlhus the cams r can be soadjusted as to increase their eccentricity and raise bar r higher.Secured to the ends oi' thisbar are vertical studs, which pass throughsuitable apertures in the lower flange of the pattern, into the spacebetween the same and the flask, Where they have secured to them a ring,It. This ring fits the space laterally between the pattern and flask,and as it is forced up packs the sand between it and the lowest pointthe packer reaches, thus completing the packing of the sand in theflask. Surrounding the studs, supporting the ring between the cross-barr and the flanged lower end ofthe pattern,are coilsprings,which assistthe bar to return to its original position. Vhen the mold is made, thencxtthing to do is to separate the drag and cope for the reception ofthe core, and preparatory to this y"the sand on the parting line must becut or divided. In order to do this,immediately after the completion ofthe mold I offset the shaft L between cams r r, so as to make aneccentric, r2.

Journaled on the eccentric r2 is a pit-inan,R, the other end of which ispivotally connected IOO IIO

IIS

i i tern.

mold is being made.

to the links t. These links extend vertically np into the bore of thepattern, and have connected to them at one angle the bell-cranks S,which are fulcrumed at another angle to a boss projecting inward fromthe pattern, and the remaining angle of each of said bell-cranks ispivotally connected to a vertical knife, s. There are two knives s.YBefore they reciprocate laterally to divide the sand, as willhereinafter be more fully explained, these knives stand side by sidevdiametrically within said pattern C, their inner` edges lapping pasteach other-and their outer edges occupying and lling completely thelongitudinal slots placed diametrically opposite each other in the pat-One rod of link t travels vertically within the hollow pattern on oneside of the knives and the other rod on the opposite side. Both are soconnected to the crank S, which pivotally connects them to the knives s,that when said links are drawn down they Aforce the knives radiallyoutward through the longitudinal slots in the pattern in directionsdiametrically opposite each other to the shell of the iiasks, thusdividing the sand. These knives are quite thin, so that when they dividethe sand they leave but a narrow korf.

This kerf would,when the cope and drag were clamped together,ordinarilyleave an opening, which, when the casting was made, would makea fin on the pipe. In order to avoid this, I place a thin strip of metalabout the thickness of theknives s, conforming tothe shape of themeeting edges of the cope and drag, and place it between them when theWhen the flask proper is put up preparatory to casting, this strip ofmetal is omitted. The knives have a perfectlyhorizontal movement byreason of studs t t. Permanently secured fiat against said knives s,inlateral alignment withthe gates of tlie flask, are flat stripsof metalS', of the same thickness and depth as the said knives, and as long,say, as the blade of caps B. The slots in the pattern in register withthese strips S are made correspondingly wider to accommodate theirpassage in and out with the knives. Thus when the said knives arereciprocated to cut the sand the kerf is made wider at the transverseplane ofthe knives, so that when the iiask is finally set up, ready forthe process of casting, the openings made by the caps B of the saidgates and the blades b thereof' are connected with the castiugchambersurrounding the core.

The lower end of the'packer is beveled, and

' by vertically adjusting the hopper [can regulate the iiow of sand intothe flask. This'vertical adjustment can be accomplished in many ways;but I prefer the way shown in Fig. 2. By referring to said Fig. 2 itwill be observed that this hopper 4 is supported by means of a verticalscrew,5,the threaded portion of which passes throughcorrespondingly-tapped lugs projecting from said hopper, and which hasloearin gs in lugs 6 6, projecting laterally toward the hopper fromstandard E. This screw 5 is threaded between its bearings, and byrevolving it, through the medium of a handle or other suitablemechanism,thehopper can be adjusted vertically.

The sand may be elevated into the hopper f by hand or n'iachinery,either way being possible.

Ido not wish to be confined to matters of detail in the construction ofmy invention, as described and shown, for it is believed these may bedeparted from without affecting the merits or principle of my invention.y The operation of my machine is substantially as follows: The cope anddrag are placed upon the cylinder D, so that they surround the patternC, and so that the protuberances projecting from their basal flanges mayenter suitable recesses or apertures in the contiguous flanges of saidcylinder, as shown in Fig. 4t. They are then clamped together, carebeing rst taken to adjust the caps lof the gates so that thedividingblades thereof come between the contiguous edges of the projectingportions forming the gates of the flasks, and to adjust between themeeting edges of the cope and drag diametrically opposite the gates athin strip of metal the thickness of knives s s. This operation of themeeting edges of the cope and drag allows for the kerf of the knives, sothat afterward, when the iiask is ready for use, the sand in the copeand drag is. brought close together and forms one complete mold. l Whenthe cope and drag are placed in position, as aforesaid, the hopper issupplied with sand, which immediately gravitates down into the spacebetween the pattern and cope and drag. At the same time the packer(which has previously been lowered into said space) is revolved. thusslowly packing the sand as it is poured into it from above.

If the sand should flow too fast, the hop-A per is adjusted vertically,so that the beveled edges of the drum G close the mouth of said hopperand limit the fiow of sand. Then the packer has screwed itself up out ofthe flask, the button 0 on the cable, by which said packer is suspended,engages the sprockets of the sprocket-wheel O and revolves itsufficiently to actuate rods n n. K, so as to impart the motionY ofshaft Ito. shaft L, and shaft L, through the medium of camsfr r, pushesthe ring B up so as to pack the sand in the lower part of the ask. Asthe ring It withdraws the eccentric r2 of shaft L operates the knivesthrough the medium of IOO These rods shift clutch pitman It', links tt,and bell-cranks S, so that,

ing legs a and bosses a a, which form a fiask having gates, as setforth.

2. In a pipe-molding machine, the con1bination of cope A and drag A',having legs a a, gates a a', cover B, and pattern C, as set forth.

3. The combination, in. a pipe-molding machine, of the drag and copea`nd pattern C, with the packer F, operating as described, shaft L, camsi* 1, cross-bar 1", having Vertical studs projecting therefrom, and ringR, Substantially as and for the purpose set forth.

4. The combination, in a pipe-n1olding machine, of the drag and cope andpattern C, with the packer F and ring R, operating as described, shaftL, having eccentric 7'?, pitman R', links t 1, bell-cranks S, and knivesss, substantially as and for the purpose set forth. l

-and A and pattern C, of the 1atera11y-recip rocating,` knives s s,bell-cranks S, links t, and means for operating the same.

In testimony that I claim the foregoing as my own I hereunto affix mysignature in presi ence of two witnesses.

JAMES C. MCDERMOIT.

Vitnesses:

JAMES H. CoYNii, FRANK D. THoMAsoN.

